Aspect
Guerrilla Mail
Mailinator
Inbox Privacy
Private inboxes tied to your browser session. Only you can access your emails, and nobody else can read your inbox even if they know your address. This makes Guerrilla Mail significantly more secure for receiving verification codes, password resets, and any sensitive information.
Public inboxes on the free tier — anyone who enters the same email address sees all messages. This is a critical security vulnerability for any signup involving sensitive information. Private, secure inboxes are only available on paid plans with custom domains.
Sending Capability
Can send outgoing emails, which is a rare and genuinely useful feature among disposable email services. While deliverability is inconsistent (many recipients filter messages from Guerrilla Mail's servers), the ability to send is valuable for testing, basic two-way communication, or situations where a service requires you to reply to an email.
Receive-only on all tiers, including paid plans. Cannot send or reply to any emails. This is a significant limitation for use cases where a service requires email-based correspondence rather than just one-way verification.
Pricing Model
Completely free with no paid tier available. The service is supported by modest advertising and has operated on this model since its inception. There is no premium upgrade path, which means the free experience is the full experience.
Has shifted heavily toward paid plans over the years. The free tier is increasingly limited with restrictions on features and retention. Paid plans start at $79/month for teams, which includes private domains, API access, and configurable retention. Enterprise pricing goes higher for organizations with large-scale testing needs.
API Access
Offers a free public API at api.guerrillamail.com. The API is basic but functional for simple automation tasks — creating inboxes, checking for new messages, and reading email content programmatically. Suitable for individual developers with straightforward needs.
Professional-grade API available only on paid plans. Well-documented with SDKs, webhook support, and enterprise-level reliability. Used by corporate QA teams for automated testing of email-dependent workflows. Significantly more capable than Guerrilla Mail's free API, but the $79/month entry price puts it in a different category.
Domain Blocking
All Guerrilla Mail domain variants — guerrillamail.com, guerrillamailblock.com, grr.la, and others — are heavily blocked after 18+ years of operation. These domains appear on virtually every commercial blocklist, making the service unreliable for signing up on mainstream websites.
The mailinator.com domain is equally well-known and blocked on most websites. However, paid plans include custom private domains that are not on public blocklists, giving paying customers a genuine workaround to the domain blocking problem. This is one of the key value propositions of Mailinator's paid tier.
Custom Address Names
Allows you to choose your own inbox name — you decide what goes before the @. Combined with private inboxes, this creates a usable and secure experience. You can create a memorable address and be confident that only your session can access it.
Also allows custom inbox names on the free tier, but since inboxes are public, choosing a custom name creates a security risk. If you use
[email protected], anyone who guesses or knows that address can read all messages. The custom naming feature is practically undermined by the public inbox model.
Email Rendering
Basic email rendering that handles simple HTML emails well but may struggle with complex marketing emails that use extensive CSS or table-based layouts. Plain text emails display reliably. Attached images are generally not displayed.
Good HTML email rendering that handles most email formats correctly, including complex marketing emails with formatting, images, and clickable links. The rendering quality is consistently better than Guerrilla Mail, particularly for testing email templates.
